Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > S. interpunctatum

The Specimen

Stenacron interpunctatum (Light Cahill) Mayfly DunStenacron interpunctatum (Light Cahill) Mayfly Dun View 6 PicturesThis is a fairly small late-season female Stenacron dun.
Collected August 22, 2006 from the West Branch of Owego Creek in New York
Added to Troutnut.com by on August 23, 2006

The Discussion

TaxonAugust 24th, 2006, 12:24 am
Site Editor
Plano, TX

Posts: 1306
Looks to be Stenacron interpunctatum (Stenonema heterotarsale).
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutAugust 24th, 2006, 8:29 am
Administrator
Bellevue, WA

Posts: 2559
Thanks. I guess that's sort of the default guess.

Do you know any reference to rule out the other species of Stenacron? I'll have to check my papers more carefully but I don't think I've found a good one yet. You're probably right just based on distribution and abundance, but I've collected such a wide range of Stenacron specimens (all listed under interpunctatum on this site) that it's hard to believe they're all the same species.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 12:26 pm
Site Editor
Plano, TX

Posts: 1306
Jason-

My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
WiflyfisherAugust 24th, 2006, 6:34 pm
Wisconsin

Posts: 612
My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.


In the past I have caught those same mayflies on the *********** River in NW WI. and came to the same conclusion using photos in Hatches.
John S.
https://WiFlyFisher.com
TroutnutAugust 24th, 2006, 7:36 pm
Administrator
Bellevue, WA

Posts: 2559
My main concern with the identification is that the differences between different Stenacron species may only be discernible in the male spinner forceps or nymph mouth parts or something. I'll try to find a better reference to the genus and figure iout.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 8:45 pm
Site Editor
Plano, TX

Posts: 1306
Jason-

Good point. Let me know what you find.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Insect photos on CatskillFlies website
In the Mayfly Genus Ephemerella by Jpsully
4May 24, 2008
by Softhackle
Re: Not Stenacron
In Male Maccaffertium modestum Mayfly Dun by GONZO
2Feb 6, 2012
by Brookyman
Re: cahills
In the Mayfly Genus Stenacron by LittleJ
8Dec 1, 2006
by Troutnut
Re: Lifestage
In Male Ephemera simulans Mayfly Dun by Taxon
1Jul 2, 2019
by Troutnut
Re: Interesting clinger species
In the Identify This! Board by CalebBoyle
7Mar 31, 2007
by GONZO
Re: from Brazil
In the Identify This! Board by Lufi
19Sep 3, 2010
by Lufi
Re: Short Strike Streamer Swipers
In General Discussion by Dryfly
14Jun 12, 2009
by Aaron7_8
Re: Spinner?
In Male Neoleptophlebia heteronea Mayfly Adult by Martinlf
1May 19, 2012
by Taxon
Re: Leucrocuta
In Male Leucrocuta hebe Mayfly Spinner by Patrick
1Aug 7, 2006
by Troutnut
Re: A variety pack
(1 more)

In the Identify This! Board by Shawnny3
11Jul 10, 2012
by Gutcutter
Most Recent Posts
Re: Upper Manistee river
In Fishing Reports by Partsman (Brian314 replied)
Re: Wading Staff suggestions?
In General Discussion by NMiAngler (Rbdjr replied)
Re: A death in the family...RIP Leo the Lionheart
In the Photography Board by Jmd123 (Troutnut replied)
Re: Anual San Pedro Parks Wilderness backpacking trip
In Fishing Reports by Red_green_h (Martinlf replied)
Re: Happy Memorial Day to my fellow Troutnuts with wildflowers from my front yard
In the Photography Board by Jmd123 (Martinlf replied)
Re: Clark's Marsh, flooded
In the Photography Board by Jmd123 (Martinlf replied)
Re: One of my hydropower dam projects just blew out!
In General Discussion by Jmd123
Re: My fly tying buddy
In the Photography Board by Wbranch (Martinlf replied)
Re: Metro Detroit Trout
In Fishing Reports by Summer_doug (Brian314 replied)
Re: Caddis query
In Fly Tying by Roguerat (Wbranch replied)